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The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.
Q. Consider a 1-bit version of the digital comparator shown in Figure. Note that the operation of this circuit is such that whichever output is 1 gives the desired magnitude compar
This assignment concerns the planning of a software development. You are required to plan the software development for a typical microprocessor based, 4-channel temperature control
Question: (a) A typical RF filter is made up of sections using circuit components. One example of a section is the Inductor-Capacitor (L-C) section. State two other types of
Q . Differentiate between an integrator and differentiator? Integrators 1 Integrators are circuits in which output voltage is proportional to the integral of the input.
Common-collector configuration: The common-collector that is abbreviated CC transistor configuration is displayed in figure. In this type of configuration, the collector is
Q. Explain how presentation layer helps in processing and establishing data in End to End layers. Ans: The purpose of presentation layer is to represent information to commu
explain how conduction take place in conductor
Q. For given asymptotic Bode plots. (a) Find ¯H 1 , ¯H 2 , and ¯H 3 at ω = 5 rad/s. (b) At what angular frequency ω is the magnitude of ¯H 4 (jω) one-half of the magnitude o
Positive Edge Triggered D Flip Flop In this type of D flip Flop ( 7475) shown in figure the output changes with positive edge of the CLK when CLK changes from 0 to 1
Define the Gauss Seidel Method The Gauss-Seidel method is an iterative method in which the voltage of each node is calculated in turn using the most up to date voltages for the
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